The feedback you gather will only be as good as the questions you ask.
https://hackernoon.com/99-feedback-questions-to-ask-your-customers-90b8ba2657db/
Asking the right questions to your customers can be a difficult balancing act. You want your customers to think about the answers, but you don’t want them to be tired or frustrated with your feedback survey.
https://unamo.com/blog/conversion/29-feedback-questions-customers/